Thermo circuit-closer.



I L. L. WHITE. THER MO cmcun CLOSER.

APPLICATION FILED FEB-18,1913- 1 l 5 1 1 4:2. Patented Aug. 24, 1915.

y m-SGJW Original application filed April 19, 1910, Serial No. 556,338.

UNITED STATES PATENT OFFICE. I

LOUIS L. WHITE, OF DORRIS, CALIFORNIA, ASSIGNOR TO PLATINUM ELECTRIC INCUBATOR OF DORRIS, CALIFORNIA, A CORPORATION OF CALIFORNIA.

THERMO CIRCUIT-CLOSER.

Specification of Letters Patent.

Patented Aug. 24, 1915. Divided and this application filed February 18,

1913. Serial No. 749,267.

To all whom it may concern Be it known that I, LoUIs L. \Vnrrn, a

i citizen of the United States, residing at Dorris, in the county of Siskiyou and State of Callfornla, have invented certam new and useful Improvements 1n Thermo Circuit-Closures, of which the following is a specification, reference being bad therein to the accompanying drawing.

This invention relates to thermo circuit closures and has for its object the production of a simple and efiicient mechanism which will auton'iatically close a circuit in order to automatically actuate a draft as soon as the temperature within a desired compartment has reached a predetermined point.

Another object of this invention is the production of a simple and efficient means for regulating the circuit closure so as to allow the same to be adjusted whereby the circuit closing device may be caused to actu ate at a predetermined time.

lVith these and other objects in view, this invention. consists of certain novel constructions, combinations and arrangements of parts, as will be hereinafter fully described and claimed.

In the accompanying drawing: Figure 1 is a fragmentary sectional view through a portion of an incubator showing the automatic draft arrangement and means for actuating or regulating the circuit closure. Fig. 2 is a top plan View of the circuit closer. Fig. 3 is a front view of the circuit closing apparatus. Fig. l is a detail perspective of one end of the regulating rod adapted to cooperate with the circuit closing apparatus illustrated in Fig. 3.

In carrying out this invention an incu-' bator of the usual type is employed provided with a heating chamber 1 and a small chamber 2 at the end of the incubator adjacent the heating chamber 1. The electrical mechanism, which for practical purposes is of a small size, is located in the chamber 2-. The incubator is provided with a. hinged cover or dampers located in its objects placed upon the floor thereof, and is preferably constructed of a supporting block 19 which is suspended from the upper side of the heating chamber 1 as shown in Fig. 1, and j n'e'ferably consists of a metal coil 20 composed of strips of brass and steel soldered together, one end of said coil 20 being secured in theend of the shaft 21, which shaft projects between the plate 22 secured to the block 19. On the other end of the coil 20 is mounted the thermostatic lever arm 23, which arm is provided with a twisted end 24 which twisted end-projects between the needle contact points 25 and 26 and has its flat side faces located intermediate the contact points 25 and 26. In order to adjust the thermostatic lever 23 in the proper position between said contact points in case the spring 20 should become twisted or forced out of its normal position, the arm 28 is mounted on the shaft 21 and is connected by a connecting rod 29 with a lever arm 30, which arm is mounted on a shaft 31,

said shaft 31 projecting across the heating chamber 1 as illustrated in Fig. 1 and terminating at its outer end in a plate 31.

mounted on the outside of the incubator as necessary for the arm in order.to close a contact between one of the points and 26. Of course. the points 25 and 26 are each mounted on a suitable insulating block 27 and are connected to the binding posts 26 and 94". It should be understood that the contacts El, 25 and 26 control circuits which operate a motor, which motor is adapted to control the door 4 through the medium of the rod 453 illustrated in Fig. 1 of the drawings.

The construction and operation of the electrical mechanism is not disclosed further in this application since this oplica- I tion is a division from the application previously filed by me and upon wvhich l S. Letters Patent No. 989,4:62 was issued on April ll, 191].

From the foregoing description, it will at:

- terior thereof.

Having thus described the invention, what i is claimed as new, is

In a device of the character described, the combination with a casing, ofa' thermostat mounted therein and including circuit terminals and a thermostatic arm'cooperating with said terminal, ashaft upon whichthe arm is mounted, a crank arm carried by the shaft, an adjusting shaft extending through and projecting externally of the casing, a crank arm carried by the adjusting shaft within the casing, a link connecting the two crank arms, a plate mounted on the outside of the casing and through which the adjusting shaft eXtends,-sai d'-plate being provided with. an arc-shaped guide slot, and

j a handle carried by the external end of the adjusting shaft and engaging the guide slot of the plate for limiting the swinging movement of said shaft and constituting means for holding said shaft against longitudinal movement upon said casing.

In testimony whereof I hereunto afiix my signature in presence of two witnesses.

' LOUIS, L. WHITE. Witnesses:

I Gr. A. GLYNN, F; C.STITSER. 

